Data transmission system and receiving device

A data transmission system, comprising:

• a transmitting device configured to transmit a data signal;
• a receiving device configured to receive the data signal transmitted from the transmitting device;
• and
• a transmission path for transmitting the data signal from the transmitting device to the receiving device,
• the receiving device comprising:
• a detection unit configured to detect a timing at which a polarity of the received data signal is inverted;
• a plurality of resistors to be selectively connected to a terminal side of the transmission path;
• and
• a switching unit configured to switch the plurality of resistors based on the detected timing, wherein
• the switching unit is configured to select a first resistor of the plurality of resistors, the first resistor having a higher resistance value than a characteristic impedance of the transmission path, during a first period, which is a predetermined period from a time point at which the polarity is inverted, and to select a second resistor of the plurality of resistors, the second resistor having the same resistance value as the characteristic impedance, during a second period, which is a period from an end point of the first period until the polarity is inverted next.